The Difference Between a CD Writer & a DVD Writer

Understanding the differences between pieces of computer hardware can be tricky. Compact discs (CDs) and DVDs look similar, but they differ in key ways.

CD Writer

A CD writer, or burner, plays a CD by shining a laser on it and reading the pattern on the disc's surface. It can also create a CD by using the laser to burn data onto the disc.

DVD Writer

DVD writers play both DVDs and CDs. It also can create DVDs by transferring data to the inner layer of the disc using a laser.

Considerations

The biggest difference between a CD writer and a DVD writer is that a DVD burner can play and create both CDs and DVDs. This allows you four options with one piece of hardware.

Disc Types

CDs are labeled "R" for recordable and "RW" for rewritable, meaning they can be used more than once. Single-use DVDs are labeled "DVD-R" or "DVD+R," while "DVD+RW" and "DVD-RW" discs can be reused up to 1,000 times. "RW" DVDs are not compatible with older players, or even some new ones.

Compatibility

Before 2003, CD writers and DVD writers would read or write only one type of disc, either the "plus" or the "minus." This was a major difference, but this no longer holds true, as all combinations are now compatible.

References

• CNET's Burner Buying Guide
• Personal Computer Users Group: CD and DVD Info